2021 İstanbul Cup – Doubles

Alexa Guarachi and Desirae Krawczyk were the defending champions, but Guarachi chose not to participate this year and Krawczyk chose to compete in Stuttgart instead.

Veronika Kudermetova and Elise Mertens won the title, defeating Nao Hibino and Makoto Ninomiya in the final, 6–1, 6–1.

Seeds
• # 🇷🇺 Veronika Kudermetova / 🇧🇪 Elise Mertens (champions)

• # 🇯🇵 Nao Hibino / 🇯🇵 Makoto Ninomiya (final)

• # 🇪🇸 Lara Arruabarrena / 🇨🇿 Renata Voráčová (first round)

• # 🇷🇺 Anastasia Pavlyuchenkova / 🇷🇺 Anastasia Potapova (semifinals)